The Most Badass Freakin' Overlord in the Cosmos:
Zetta is fought with a level 2000 Unholy King, four level 2000 Tao Tiehs, a level 200 Daemon, four level 2000 Bahamuts, a level 2000 Lilith, and a level 2000 Archdemon. The field is seperated with one half having Ally Damage 80%, and the other having Enemy Boost x3. There is a no entry/no lifting and a lake between the two. Zetta himself stands on a Warp/No Lifting, of which there are two on each side. Anyway, for those who factor the Geo Symbols when judging Zetta, keep in mind the best way to survive more than two turns is to destroy the Ally Damage Geo Symbols, which turns both sides of the field into Enemy Boost x3, so you may as well pretend the entire field is Enemy Boost x3. Also the Enemy Boost is conveniently located behind Zetta's army, meaning you'll probably need to kill them before you can get to it.
Zetta
Bad-ass
Lv 3200
Counter 1
Mv 1 Jm 10
HP 2844750 (2828084 without Nemesis) (2808644 without Nemesis & Arcadia) (2742600 unequiped)
SP 76167 (60615 without Nemesis) (50895 without Nemesis & Arcadia)
ATK 93053 (40449 without Nemesis) (30729 without Nemesis & Arcadia)
DEF 54399 (38847 without Nemesis) (27080 without Nemesis & Arcadia)
Hit 51016 (35464 without Nemesis) (24967 without Nemesis & Arcadia)
INT 69641 (54089 without Nemesis) (42413 without Nemesis & Arcadia)
SPD 47293 (31741 without Nemesis) (21062 without Nemesis & Arcadia)
RES 48139 (32767 without Nemesis) (23047 without Nemesis & Arcadia)
EXP 7803390655
NEXT 4879710
Nemesis (Monster Weapon)
Arcadia
Galactic Muscle
Physical: ~20000
Zetta Beam (65): ~90000, MT
BadAss Overdrive (65)
Average HP: ~410530
Ehhh... stats are disappointing, as is lack of movement, but his attacks kick ass for damage. At least for this point in the game anyway. Heavy of some sort I guess. Falls apart if equipment is stolen.